Roman - It is not about the cost of the animal, my concern is that she was already going to pass and that treatment may exacerbate her existing conditions, which is something I believe I discussed in my original post. In my research, some people seemed to advise against treating WC animals because they believe it creates further stress which may actually expedite their deaths. I had also read that fecal testing often fails to show parasites that are indeed are present, and some say one should just treat regardless of results.
That said, she did end up passing anyway. The male is doing fine, other than not eating yet. Roman, I will try the chicken idea, thank you.